So my sister has a son who is almost 7 months now ... and I think she's got post partum depression she hasn't slept.. and has been yelling at him because he's screaming .. which I know sometimes people get frustrated and yell but hers is on a different level. And the last two days I have been taking care of him cause she won't get up. Today I fed him and woke her up and was like you need to change his diaper and she didn't even change him till like 30 mins ago so he sat in a wet diaper. She needs some help .. advice ?